Water, steam, or air valve.



.No. 643,075. Patented Feb. 6, I900. .1. w. VAN BRUCKLIN.

WATER, STEAM, on AIR VALVE.

(Application filed Nov. 2, 1898.)

(No Model.)

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JOIIN \V. VAN BROCKLIN, OF SEATTLE, WASHINGTON, ASSIGNOR OF ONE-SIXTEENTII TO RUSSELL L. DUNN, OF SAN FRANCISCO, CALIFORNIA.

WATER, STEAiVL'OR AIR VALVE.

SPECIFICATION forming part of Letters Patent No. 643,075, dated February6, 1900.

Application filed November 2,1898. Serial No. 695,334. (No model.)

To all wit/0171, it may concern.-

Be it known that L'JOHN W. VAN BROOK- LIN, a citizen of the UnitedStates, residing at Seattle, King county, in the State ofWashington,have invented a new and usefulWater, Steam, or Air Valve, ofwhich the following is a specification.

My invention relates to improvements in a valve used under pressureeither for water, steam, or air; and the object of myimprovement is toavoid lifting a heavy Weight and unnecessary friction in opening andclosing the valve while working under pressure. I attain this object bythe mechanism illustrated in the accompanying drawings, in which- Figure1 is a vertical section of valve and chest. Fig. 2 is a top view ofsame, One-half being shown in section on the line A B of Fig. 1. Fig. 3is an end view of valve. Fig. 4. is a surface view of fixed piston ordiaphragm.

C is the chest in which the valve F moves and is attached to theinlet-pipe at E, being provided at the upper line of junction with aninternally-presented annular guide rib or flange. The valve F, being ahollow cylinder, moves up and down over the fixed piston N, which issecurely fastened to the lid M by the four studs L L. Thevalve F hasacross-bar G, to which is secured the stem H, which passes through thestuffing-box I. (See Fig. 1.) The chest C, having a larger insidediameter than the outside diameter of the valve, allows the water, air,or steam to surround the valve, thereby offering no resistance to itsmovement, also passing over the top of the valve. The pressure iscarried by the fixed diaphragm or piston, thus leaving the valve free inits movement, except its own weight andthe friction of the piston andthe stuffing-box around the stem. The seat J is bored to correspond tothe bevel on the valve. (See Fig. 1.) The inlet and outlet are shown byarrows.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. In combination with a cylindrical valve, a casing having an inlet andoutlet and a valve-seat surrounding the latter, a valvechest formingpart of said casing and provided with an internally-presented annularguide rib or flange in contact with the said valve, and a fixed pistonwithin the said valve, cooperating with the said rib in guidin g thesame, substantially as and for the purpose set forth.

2. A valve-casing provided with a fixed and

